Apparatus for rifling pipes or tubes.



C. FELL.

APPARATUS FOR RIFLING PIPES 0B TUBES.

uruouxon'rmnn Jun 1a, 1909.

1,033,568; Patented July 23, 1912.

2 SHEETS- REIT 1.

WITNESSES INVENTOR r 01% APPARATUS FOR RIF PIPES 0B TUBES. urucumn mumJUNE 18, 1909.

1,033,568 Patentgd July 23, 1912.

2 SHEETS 0/101 5411 MM: @MUAM/ML UNITED STATES PATENT OFFICE.

CHARLES FELL, OF LORAIN, OHIO, ASSIGNORTO NATIONAL TUBE COMPANY, OFPITTSBURGH, PENNSYLVANIA, A CORPORATION OF NEW JERSEY APPARATUS FORRIFLING PIPES OR TUBES.

Specification of Letters I'atent.

Patented July 23, 1912.

Application filed June 18, 1909. Serial No. 502,987.

To all whom it may concern:

Be it known that I, CHAnLns FELL, of Lorain, Lorain county, Ohio, haveinvented a new and useful Apparatus for Rifling Pipes or Tubes, of whichthe following is a full, clear, and exact description, reference beinghad to the accompanying drawings, forming part of this specifieation,inwhich- Figure l is a front elevation of my improved apparatus and Fig. 2is a sectional top plan view of the same, thesect-ion of the riflingrollers being on the line II-II of Fig. 1.

My invention relates to providing pipes or tubes with spiral ribs, thesebeing known as rifled tubes.

The object of the invention is to provide a simple and effectivemechanism by which this rifling may-be rapidly carried out.

In the drawing, in which I show a pre ferred form of my apparatus,.2 isa hollow frame containing six idle rifling rollers 3. These rollers areshown as spaced equally around the circle Within the housing or frameand set at the proper angle to give the desired pitch to the rifling orgrooves in the pipe. I have shown the bearings for these rollers asradially adjustable by means of bearing screws 4. The housing 2 may besecured upon any suitable foundation framin 5.

IBeyond the rifling rollers I rovide a pair of pulling rolls 6, 6, theserol s being set at the same angle as therifling rollers, in relation tothe travel of the pipe through the apparatus. These rolls are skew rollswith grooved peripheries arranged to give a pass corresponding to theshape of the pipe. They are power driven through any suita leconnections and act to pull the pipe from the rifling rollers after ithas entered their bite. In starting the operation, the pipe or tube isforced forwardly through the rifling rollers by means of any suitablerear pushing apparatus, until they enter the bite of the pulling rolls.As the tube passes throu h the rifling housing, and is acted upon by t erifling rollers, it will be turned or revolved through a plane whichwill correspond to the angle at which the rifling rollers are set. Assoon as the tube enters the pulling rolls these being power driven willactto pull the pipe or tube through the rifling rolls and at the sametime cause itto revolve in a plane conforming to the angle at which theyare set, which is the same as the angle of the rifle or spiral groove.

The advantages of my invention result from the simplicity of theapparatus and its rapid and efl'ective action in carrying out therifling operation.

Changes may be made in the form and arrangement of the rifling rollers,and the means supporting the same as wellas in the means for causing thetravel of the pipe therethrough while allowing its rotation,

without departing from my invention.

. I claim 1. In apparatus for rifling pipes or tubes, the combinationwith a series of rifling rolls arranged to contact at a lurality ofequidistant points on the perip liery of the pipes or tubes in formingthe rifling beads thereon said rolls being angularl adjustable to varythe pitch of the rifling ormed on the pipes or tubes, of means in frontof said rifling rolls arranged to draw the pipes or tubes lengthwisebetween the rifling rolls.

2. In a paratus for riflingpipes or tubes, the combination with a seriesof rifling rolls arranged to contact at a plurality ofequidistant-points on the riphery of the ipes or tubes in forming th:rifling beads t ereon, said rolls being angularly adjustable to rollsarranged to contact at a plurality cf equidistant points on theperipherv of the [pipes or tubes in forming the rifling beads and meansfor Positively driving said feed thereon, said rolls being angularlyadjustrolls. 10

able to vary the pitch of. the rifling formed In testimony whereof, Ihave hereunto set on the pipes or tubes, of feed rolls in front my hand,of the rifling rolls whereby the pipes or CHARLES FELL.

tubes are drawn lengthwise through the Witnesses: rifling rolls, saidrolls being skewed and EDWIN P. COREY;

having a line contact with the pipes or tubes H. J. ELLEM.

